Rotatable filtering apparatus



1955 H. w. HAPMAN ROTATABLE FILTERING APPARATUS Original Filed Oct. 12,1944 Q al llllnll Ill lllNl Q Q attorneys United States Patent OROTATABLE FILTERING APPARATUS Henry W. Hapman, Kalamazoo, Mich.,assignor of forty per cent to Hannah Jane Hapman, Kalamazoo, Mich.

Original application October 12, 1944, Serial No. 558,424, now PatentNo. 2,559,614, dated July 10, 1951. Divided and this applicationNovember 15, 1950, Serial No. 195,849

1 Claim. (Cl. 210-154) The present invention relates to improvements incoolant tanks, and in particular, to a sludge removing and filteringapparatus therefor.

One object of the invention is to provide a coolant and sludge tank inwhich the coolant liquid is circulated there through in such a manner asto be freed from foreign particles and to provide means for removingsaid particles and filtering the coolant liquid to purify the same forrecirculation to the source of use.

Another object is to provide a coolant tank and sludge remover which isprovided with a filter element capable of being readily removed for thepurpose of cleaning, repair and reconditioning so as to restore thefilter element to its initial cleanliness at various intervals duringthe use of the coolant tank.

Another object is to provide a coolant tank and sludge tank having asludge conveyor and filtering element arranged to swing on a horizontalaxis to permit frequent cleaning and inspection from time to timewithout removing the filtering element independently and to providemeans for removing foreign matter and particles from the filteringelement.

Another object is to provide a coolant tank and sludge remover which isprovided with a filter element capable of being rotated on asubstantially horizontal axis for the purpose of cleaning, repair andreconditioning so as to restore the filter element to its initialcleanliness at various intervals during the use of the coolant tank.

In the drawings:

Figure 1 is a top plan view of a sludge tank equipped with a swingableand rotatable filter, according to one form of the invention; and

Figure 2 is a vertical section taken along the line 2-2 in Figure 1.

Referring to the drawings in detail, Figures 1 and 2 show one form ofthe invention in which a coolant tank, generally designated 15, iscomposedof side walls 16 having end walls 17 and a bottom wall 18 havingconverging or sloping sections to form a trough for an endless flightconveyor 19. A fluid circulating pump (not shown) is provided for thecoolant tank shown in Figure 1, and said pump has its intake connectedto pipes 20 and 21. The discharge side of the pump is connected to apipe line 22 and said pipe line is connected to the pipe through themedium of a control valve 23, and to a discharge nipple 24 by means of acontrol valve 25. In addition, a rubber cleaning hose 26 is coupled tothe discharge pipe 22 so that upon closing of the valves 23 and 25 andopening of the valve 27, fluid under pressure may be forced through theflexible hose 26 for the purpose of washing the external surface of thefiltering element mounted in the tank.

Interposed in the pipe 21 is a union or coupling 28 to which is secureda short length of pipe 29 having a swivel coupling on the end thereof asat 30. The swivel coupling is provided with a short length of pipe orrearward pivot ice member 31 which is connected. to the header 32 of arotary filtering element 33 which is formed with a zigzag peripheralsurface in much the same manner as the filtering elements shown inFigures 6 to 10 inclusive of my co-pending U. S. Patent No. 2,559,614,issued July 10, 1951, of which this application is a division. That isto say, the reticulated screening 34 has its ends embedded in the header32 and a similar header 35 with a central supporting pipe extendingtherebetween to hold the reticulated screening or fabric 34 in itspre-shaped position.

The free end of the filter is supported by means of a projection orforward pivot member 36 formed on the end header 35 which is adapted torest upon a supporting shelf or filter pivot rest 37 carried by thesupporting bar 38 connecting the side walls 16 of the coolant tank 15.The conveyor or sludge collector 19 is driven by an electric motor (notshown) which is drivingly connected to a sprocket wheel 39, and saidcoolant tank is provided with a bafide wall 40 adjacent one end to formand provide an inlet chamber into which the coolant liquid is dischargedfrom the machine tool. In order to manually rotate the filtering element33 periodically, a series of handles 41 is provided on the header 32.

During operation of the coolant tank shown in Figures 1 and 2, theliquid is pumped from the tank through the filtering element and thencethrough the short pipe 29 to the intake of the pump through the pipe 21when it is discharged through the pipe 22 to the machine tool by way ofthe discharge nipple 24. The entire filtering element may be rotated onthe swivel 30 by simply rotating the pipe 31 a slight angular distanceby means of the handles 41 to present new filtering surfaces to thecoolant liquid being filtered and recirculated. In addition, thefiltering element 33 may be completely removed from the tank 15 byuncoupling the swivel coupling 30 and then freely lifting the filteringelement 33 bodily upward out of the liquid.

This application is a division of my co-pending application Serial No.558,424, filed October 12, 1944, for Apparatus for Conditioning,Cleaning and Circulating Cooling Liquid, which has since been issued asU. S. Patent No. 2,559,614 dated July 10, 1951.

What I claim is:

A liquid filtering apparatus comprising a tank for collectingsediment-bearing liquid, a pipe extending into said tank and having asubstantially horizontal end portion therein, a swivel coupling mountedon said end portion and having relatively-rotatable separable swivelcomponents, said components having a liquid passageway extendingtherethrough, a filter pivot support disposed in said tank in axialalignment with said coupling and spaced apart therefrom, said filterpivot support having an upwardly-facing bearing portion on the upperside thereof, and a perforated rotatable filter detachably connected tosaid pipe at said coupling and removably mounted in said tank in thespace between said coupling and said pivot support, said filter havingspaced opposite ends with axially-aligned pivot members thereon, one ofsaid pivot members being tubular and connected to one component of saidcoupling, said filter element being coupled at only one end thereof, andthe other pivot element at the other end of said filter element oppositethe coupled end thereof resting upon and rotatably and detachablyengaging said bearing portion of said filter pivot support whereby saidfilter may be selectively rotated a partial revolution periodically tomove clogged portions thereof out of the liquid while moving uncloggedportions thereof into the liquid, or quickly and easily removed bodilyfrom the tank.

(References on following page) References Cited in the file of thispatent UNITED sTA Es PATENTS Hyatt Jan. 10, 1888 Weller Mar. 21, 1905Nelson Oct. 15, 1912 Bicalky May 8, 1917 Anderson Feb. 4, 1919 Peck May4, 1920 4 4 Brown, Jr. July 1, 1924 Genter June 4, 1929 Lamort Jan. 30,1934 Moore Mar. 12, 1946 Hoster Sept. 23, 1947 Eves et a1 Nov. 11, 1947FOREIGN PATENTS France Oct. 3, 1938

